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3 years ago

1 answer:

Elena-2011 [213]3 years ago

6 0

1. x = -23
2. x = 81/2 or 40.5
3. x = -45
4. x = -9/10 or -0.9
5. x = 7

Hope this helps!
and May the Force Be With You

-Jabba

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Phil strung two sets of lights around the window of his store. The first set of lights blinks every 30s and the second every 45s

Amiraneli [1.4K]

Answer:

Every 90 seconds, the two sets of light blink together.

Step-by-step explanation:

Given that there are two sets of lights.

First light blinks at every 30s and

Second light blinks at every 45s

To find:

How often the sets of lights blink together?

Solution:

As per given statement,

First light blinks after 30s, 60s, 90s, 120s, 150s, 180s, ........

Second light blinks after 45s, 90s, 135s, 180s, .....

If we look at the common time, shown by underlining it, the two sets of light blink at the same time after 90s, 180s, ...... and so on.

So, the two lights blink together after every 90s.

This can also be solved by finding LCM (Least Common Multiple) of the two numbers i.e. 30 and 45.

Let us have a look at the factors of 30 and 45.

30 = 2 $\times$ 3 $\times$ 5

45 = 3 $\times$ 3 $\times$ 5

So, LCM = 2 $\times$ 3 $\times$ 3 $\times$ 5 = 90

So, after every 90s, the lights will blink together.

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3 years ago

Which is equivalent to 2163? 3 6 36 7

Anon25 [30]

Answer:

Numbers 3 and 7

Step-by-step explanation:

2163÷3= 721

2163÷6= 360.5

2163÷36= 60.08

2163÷7= 309

The answer is number 3 and 7 since both can be divided by 2163 without having remainders like number 6 and 36

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3 years ago

Find the value of n in the Triangle

Hoochie [10]

For the value of n it would be 40

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3 years ago

If I said 15402,How It could be in 2 significant?

nikdorinn [45]

Answer:

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Step-by-step explanation:

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3 years ago